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发明名称
Elektronrørsforstærker med et som optisk Indikator virkende elektrisk Udladningsrør.
摘要
申请公布号
DK62894(C)
申请公布日期
1944.11.13
申请号
DKD62894
申请日期
1939.10.25
申请人
AXEL HERMAN OTTOSEN
发明人
AXEL HERMAN OTTOSEN
分类号
主分类号
代理机构
代理人
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